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From: peter%versatc.uucp@ames.arc.nasa.gov (Peter Tapscott )
Newsgroups: rec.audio.high-end
Subject: How to build interconnects
Message-ID: <9812@uwm.edu>
Date: 28 Feb 91 13:50:45 GMT
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Approved: tjk@csd4.csd.uwm.edu
Originator: tjk@csd4.csd.uwm.edu

Michael from Florida wrote to ask how to build twisted pair
shielded interconnects.  Since this might be of general
interest, a posting seems be appripriate.

The cable has three conductors:
	signal
	signal return
	shield

Connect the signal to the center pin of the RCA
plugs.  

Connect the signal return to the shell of the RCA
plugs.

Connect the shield to the shell of the RCA jack at
the device receiveing the signal (preamp if this is
a interconnect to a CD, amp if this is a preamp-amp
interconnect.

Insulate the shield near the other end of the cable.
Use RTV (room-termperature-vulcanizing rubber) or shrink
tubing or whatever.

If you want to prevent those dastardly oxygen atoms from
attacking your oxygen-free copper, coat the connections 
in the plugs with RTV.  Might help in humid climates also.

Someone will ask about cable and connectors.  Old
Colony has some Magami cable, but there are a lot of
other cables that would work fine.  Standard microphones
that use XLR connectors need this type of cable, so a
pro-sound place (musical instruments, amps, etc) might
be a good source for reasonable prices on good cable.
(high-enders: please post if you find good cable.)

I bought my cable in Akihabara (Electronics City) in
Tokyo.  Besides all the mid-fi vendors, there is a flea
market arrangement under the train tracks that sells
all manner of small parts.  They have at least 6 types of
high-end RCA plugs, and cable is available by the foot.
I bought Hitachi cable because I wanted two conductor
plus shield, but they have all types, even European.
Some are coax, some are 2-cond + shield.
-- 
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